The design of multi-value sand nourishments

The design of multi-value sand nourishments

Gijsman, R.

Stive, M.J.F. (mentor)
Yuan, J. (mentor)
Van Thiel de Vries, J.S.M. (mentor)
Luijendijk, A.P. (mentor)
Jansen, M.H.P. (mentor)
Liu, P.L.F. (mentor)

Civil Engineering and Geosciences

Hydraulic Engineering

Hydraulic Engineering

2016-02-19

Relative sea level rise and climate change, but also the migration of the growing world population to the coast, continuously increase the pressure on the coastal system. In combination with the increased awareness for sustainability, the interests in the coastal zone become integrated and complex. Integrated Coastal ZoneManagement (ICZM) becomes increasingly important to satisfy the diverse societal needs in the coastal zone. Along sandy shorelines multi-value sand nourishments are therefore potentially valuable and feasible solutions. An example of amulti-value sand nourishment is the Sand Engine in theNetherlands. This innovative 21.5Mm3 mega nourishment was developed in line with the Building with Nature (BwN) design philosophy. To create value with multi-value sand nourishments for other endangered coastal zones in the world, a design methodology for multi-value sand nourishments is necessary. In this research a design methodology is developed that integrates the socioeconomic environment in order to design sand nourishments for the societal needs and determine their feasibility. To create optimal values for society with sand nourishments, the physical and the socioeconomic environments are integrated in the design cycle. The physical environments of sandy shorelines provide functions, and the desired values depend on the socioeconomic environment. To create an overview of the potential values of sandy shorelines, functions categories are defined: culture, economy, food resources, infrastructure, nature, safety, tourism & recreation and water resources. Sand nourishments aim to increase the functionality of sandy shorelines for one (or more) of these categories. In the developed methodology, the physical and the socioeconomic environment are integrated in the design cycle by quantifying the sandy shoreline function categories with indicators. In this way the functionality of the physical environment is translated to potential values for the socioeconomic environment and the societal needs are translated to benchmarked indicators for the physical environment. An application to Gold Coast’s Palm Beach in Australia illustrated that the developed methodology supports the design of multi-value sand nourishments. The most potential solutions for Palm Beach are assessed based on their feasibility in terms of finance and stakeholder commitment. At strategic level, the most potential was allocated to the solution to increase the sand buffer. At conceptual level, the concentrated nourishment was considered to be supported the most by the government and the businesses. An increased surf quality for experienced surfing, and therefore increased value for tourism & recreation of Palm Beach and the Gold Coast can be created with this solution.

Integrated Coastal Zone Management
Building with Nature
the Sand Engine
sand nourishments
sandy shorelines
design methodology
functions
values
feasibility
Palm Beach
Gold Coast
Australia

http://resolver.tudelft.nl/uuid:f43ffb19-0cc9-41b0-95a6-b969b47f0330

Student theses

master thesis

(c) 2016 Gijsman, R.